1. H.Deacon, US Patent 85 370 (1968).
2. C. P. Roberts, Chem. Eng. Prog. 46 (1950) 457.
3. H. G. Janson, Chem. Ing. Tech. 39 (1067) 729.
4. P. Gallone and G. Hessner, Electrochem. Technol. 3 (1965) 321.
5. J. S. Robinson, ?Chlorine Production Processes, Recent and Energy Saving Development?, Noyes Data Corporation, Park Ridge (1981).